My Last Humble Request Forex Trading

My final humble request to code this sample :

BUY CANDLE :

1. If a candle OPENS BELOW OR EQUAL to PREVIOUS candle low and CLOSES EQUAL OR BELOW the earlier candle CLOSE.
2. Then Alert with a pop up message

SELL CANDLE :

1. If a candle OPENS ABOVE OR EQUAL to PREVIOUS candle Excessive and CLOSES EQUAL OR ABOVE earlier candle CLOSE.
2. Then Alert with a pop up message

The sample on the chart :
Earlier candle Excessive : 0.74781 and shut : 0.74780

Down Arrow Candle open : 0.74781

Down Arrow candle Shut : 0.74782

Situation glad for SELL.